Manual crank



FIG. 1 is a perspective view of a manual crank showing my new design in use condition;

FIG. 2 is an enlarged perspective view thereof;

FIG. 3 is an enlarged, top view thereof;

FIG. 4 is an enlarged, bottom view thereof;

FIG. 5 is an enlarged, right side view thereof;

FIG. 6 is an enlarged, front view thereof; and,

FIG. 7 is an enlarged, back view thereof.

The broken line showing in the views is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a manual crank, as shown and described. 